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    题名: Influence of Boundary on the Effect of Double-layer Polarization and the Electrophoretic Behavior of Soft Biocolloids
    作者: Yeh, Li-Hsien;Fang, Kuo-Ying;Hsu, Jyh-Ping;Tseng, Shiojenn
    贡献者: 淡江大學數學學系
    关键词: Electrophoresis;Biocolloids;Soft particles;Boundary effect;Double-layer polarization;Electroosmotic retardation flow
    日期: 2011-12
    上传时间: 2014-04-22 13:57:01 (UTC+8)
    出版者: Amsterdam: Elsevier BV
    摘要: The electrophoresis of a soft particle comprising a rigid core and a charged porous membrane layer in a narrow space is modeled. This simulates, for example, the capillary electrophoresis of biocolloids such as cells and microorganisms, and biosensor types of device. We show that, in addition to the boundary effect, the effects of double-layer polarization (DLP) and the electroosmotic retardation flow can be significant, yielding interesting electrophoretic behaviors. For example, if the friction coefficient of the membrane layer and/or the boundary is large, then the DLP effect can be offset by the electroosmotic retardation flow, making the particle mobility to decrease with increasing double layer thickness, which is qualitatively consistent with many experimental observations in the literature, but has not been explained clearly in previous analyses. In addition, depending upon the thickness of double layer, the friction of the membrane layer of a particle can either retard or accelerate its movement, an interesting result which has not been reported previously. This work is the first attempt to show solid evidence for the influence of a boundary on the effect of DLP and the electrophoretic behavior of soft particles. The model proposed is verified by the experimental data in the literature. The results of numerical simulation provide valuable information for the design of bio-analytical apparatus such as nanopore-based sensing applications and for the interpretation of relevant experimental data.
    關聯: Colloids and Surfaces B: Biointerfaces 88(2), pp.559-567
    DOI: 10.1016/j.colsurfb.2011.07.033
    显示于类别:[數學學系暨研究所] 期刊論文

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